138187881294 has 16 divisors (see below), whose sum is σ = 282803106432. Its totient is φ = 44991403128.

The previous prime is 138187881287. The next prime is 138187881341. The reversal of 138187881294 is 492188781831.

It is a super-2 number, since 2×138187881294² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267805714 + ... + 267806229.

It is an arithmetic number, because the mean of its divisors is an integer number (17675194152).

Almost surely, 2^138187881294 is an apocalyptic number.

138187881294 is an abundant number, since it is smaller than the sum of its proper divisors (144615225138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138187881294 is a wasteful number, since it uses less digits than its factorization.

138187881294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535611991.

The product of its digits is 6193152, while the sum is 60.

The spelling of 138187881294 in words is "one hundred thirty-eight billion, one hundred eighty-seven million, eight hundred eighty-one thousand, two hundred ninety-four".